Jeremy talks to the former baseball player about being hit in the head by the first pitch he saw in his MLB career and his new book, `Get Up: The Art of Perseverance.`

Adam Greenberg, the former Chicago Cub, had that one plate appearance in July 2005 which resulted in a fastball in the face, a concussion, symptoms that will last for years, is now the author of a new book, “Get Up: The Art of Perseverance”.

"I had positional vertigo, vision issues, suffered from a bout of depression.

After about two-and-a-half years, I was back to 100% in terms on on-the-field. I corrected my vision. I worked with vision training program, Vizual Edge Performance Trainer -- unbelievable for brain function, cognitive abilities, and it really put me back on the field to be able to perform at a high level."